countersunk serrated external toothed lock washers锥形: taper; cone; cone-shape锯齿: sawtooth; serration锁紧垫圈: lock washer锯齿锁紧垫圈: specifications for spring washers-toothed lock and serrated lock washers内锯齿锁紧垫圈: serrated lock washers internal teeth下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:锥形锯齿锁紧垫圈，即可在微信中查询翻译
